四十万年以前，一个非凡的种群加入到了这个世界，他们是智人，我们的祖先。他们翻山越岭，不断改变自己以适应环境的每一处细微变化。一次又一次地他们失去了一切，然而他们总是可以超越自己的极限并最终幸存下来。他们学会了种植农作物、驯化动物，修建村庄，改善环境，人类成为动物王国中最强大的种群，他们在想象的世界中遨游，并在这个过程中发现了美术和梦幻的能力。但种群又是怎样出现的，从哪里来的呢？

本片改编自劳伦斯·奥斯本同名小说，小说故事描绘了在摩洛哥沙漠中，一对英国夫妇和当地人在一个豪华别墅的周末聚会上相遇的悲剧。　　Speeding through the Moroccan desert to attend an old friend’s lavish weekend party, wealthy Londoners David and Jo Henninger (Ralph Fiennes and Jessica Chastain) are involved in a tragic accident with a local teenage boy. Arriving late at the grand villa with the debauched party raging, the couple attempts to cover up the incident with the collusion of the local police. But when the boy’s father arrives seeking justice, the stage is set for a tension-filled culture clash in which David and Jo must come to terms with their fateful act and its shattering consequences.

Paris and its suburbs. Two stories, four girls, four boys, on one molikan.com summer day that will change their lives forever.